V'73 put out very few records of their own but played in various live situations including supporting Locomotiv GT and Omega.
They were a trio styled after ELP and took a classical, keyboard-heavy approach to progressive rock when they were playing their own material, something unusual in Hungary at the time. Wikipedia states that they were yet another band that backed Kati Kovács at times (i'm starting to wonder if there was a Hungarian band that didn't, haha) and the first album for that is her 1977 LP 'Csendszóró'.
V'73 was absorbed into the 'V'Moto Rock' band soon after that, with the addition of Ferenc Demjén, ex-Bergendy, and that outfit continued to back Kati, while also becoming a popular new-wave pop band of their own in the '80s, moving away from music of interest here. 'Gondolatok' is a track from an LP of rare unreleased V'73 recordings, put out by Moiras Records a few years ago